Adjusting device for rotary grinding-machines.



A. WAGNER.

ADJUSTING DEVICE FOR ROTARY GRINDING MACHINES.

APPLIGATION FILED DEC. 29, 191 1.

Patented "iNov. 12, 1912.

mi; [mm/221577 Macaw V ZZ/ZQ/W Azbrec Wagner,

ALBRECHT WAGIIER, 0F BERLIN, GERMANY.

ADJUSTING DEVICE FOR ROTARY GRINDING-MACHI ES.

Specification of Letters Patent. I

Application filed December 29, 1911.

Patented NOV. 12, 1912.

Serial No. 668,510.

One of the objects of the present inventionis to enable such adjustment to be more rapidly efl'ected when for any reason the grind ing wheel or disk has to be moved away from the work as, for example, when interchanging pieces of work or when grinding a crank shaft or other work which has to be machined-upon both sides of a collar or flange, that is to say, work in connection with which the grinding wheel must be moved away from'and up to the work the,

grinding wheel often in such cases having to traverse fairly considerable distances when making such movements.

The invention broadly consists in adapting the grinding wheel or disk to be set or adjusted at various speeds, as required, by.

the one driving element depending upon whether fine, coarse or intermediate adjustment is required.

The invention also comprises other details and arrangements hereinafter more particularly referred to.

As the coarse and fine setting of the rinding wheel or disk support is always e ected through one and the same driving element, for example, a crank or the like, it follows that the grinding wheel or disk will be moved forward through exactly the same distance through which it was previously moved backward, as the driving element as well as the abutment determining the position of the piece of work or blank always remain the same even when the speed of setting varies, so that the amounts of backward and forward movement of the crank or the like can be easily controlled by the operator. 7

The accompanying drawings illustrate one mode of carrying out theinvention.

Figure 1 shows the apparatus in side sectional elevation while Fig. 2 illustrates a detail in front elevation.

In carrying the invention into effect in one convenient manner'a pin or journal 2- is mounted in the frame of the machine in such a manner as to be held from rotation and a gear wheel 3, whose hub terminates in a sleeve 4, is loosely mounted'thereon. A second gear wheel 5 is rotatably mounted upon the sleeve 4 and is provided with pins'6 which extend in a direction parallel to the axis of the gear wheel 3 and are provided with gear wheels 7 and 8. j The gear wheel 7 which is keyed to the hub of the wheel 8, is in mesh with the gear wheel 3 while the wheel 8 engages with a gear wheel 9 loosely mounted upon the pin or journal 2. To the gear wheel 9 is keyed a gear wheel 10 engaging with the gear wheel 12 secured to the driving spindle 11 through the medium -of Which. the setting or adjustment of the grinding wheel or disk is effected. The hand-operated crank 13 is also mounted upon the sleeve 4 and is provided at its end with a gear wheel 14: which engages with the wheel 5 and is adapted to be rotated through the medium of the crank 15. The wheel 1- can be locked in any position by a spring controlled locking pin 16 and the crank 13 which is loosely mounted upon the sleeve 4:, is adapted to be clamped or fixed in position on the sleevet by means of a nut 17 or any equivalent device so that the sleeve is driven by the crank when the latter is turned. The sleeve 1 in its turn may be clamped in position upon the pin or journal 2 by tightening a nut 18 or in any other convenient manner, and when required, both the crank 15 and the crank 13 may be rotated by means of the index pin 16 which conveniently takes the form of a handle.

The operation of the apparatus is as follows :-If it is required to adjust or set the grinding wheel or disk slowly for the purpose of obtaining a fine or very minute adjustment the nuts 17 and 18 are tightened up so that the gear wheel 3 and the crank 13 are connected to the stationary pin or journal in such a manner that they cannotrotate. turning the crank 15 which in its turn ro- The spindle 11 is then driven by tates the gear wheel 14'and through the medium of this latter and the gear wheels 5, 7, 8, 9, 10 and 12, the spindle 11 and consequently the grinding wheel support 19, to-

case the gear wheel 3 is clamped in position.

upon the spindle 2 the gear wheel 7 rolls upon the wheel 3 and consequently drives the gear wheel 8. If the setting operation of the grinding wheel or disk is to be accel erated the nut 17'is-slacked back while the nut 18 remains tightened up and the crank 13 is thus free to rotate upon the sleeve 4 while the latter, together with the wheel 3, is fixed upon the pin 2 so that it cannot rotate thereon. The wheel 14 is locked to the crank 15 by means of the pin 16 so that it forms, as it were, a driver or driving connection between the crank 13 and the gear wheel 5. When the crank 13 is rotated by means of its handle 16, the gear wheel 5 is driven by the wheel 14 at the same speed but the wheel 7 still rolls upon the fixed wheel 3. The action of the gear is therefore similar to that described above but the speed is somewhat accelerated due to the fact that the gear wheel 5 is driven at the same speed as the crank 13 and not atthe much slower speed by means of the gear wheel 14 as above described. If the grinding wheel or disk is to be moved through a greater distance still, then it is advisable to still further accelerate the movement of the grinding wheel support and for this purpose the nut 18 is alsoloosened and the crank 13 is firmly connected to the wheel 3 through the medium of the nut 17 Assuming a crank shaft is to be ground down on both sidesofthe crank to the same diameter,

then after one side of the shaft has been ground down to the correct diameter the grinding wheel or disk support mustbe moved backward until the grinding wheel is clear of the work or piece of work. Thereupon the work is moved in a known manner to such an extent that the other part of the shaft'comes opposite to the grinding wheel or disk.

It is obvious that the arrangement above described may also be such that the crank 13 instead of being operated by hand is operated from the driving mechanism of the machine so that the setting of the machine need not be efi'ected by hand but may if desired be eflected'automatically. Assuming a crank shaft is to be ground down to the same diameter at the points a, b, then after the part a has been ground down to the correct diameter the grinding wheel or disk support must be moved backward until the checks 0 of the Work or piece of Work are clear. Thereupon the work is moved in a known manner to such an extent that the part 7) comes opposite to the grinding wheel or disk. The return movement of the grindniiig disk or Wheel support can first of all be e ected-by fine or coarse setting by turning the crank 15 arranged on the crank 13 through one revolution in the direction indicated by the arrow, whereupon it is left to the discretion of the operator, by turning the crank 13 and locking the crank 15 through the medium of the index pin taking the form of a handle 16 to effect the moving back of the grinding wheel or disk support by means of the coarse adjusting or intermediate adjusting gear de ending upon whether the nut 18 is tightene or loosened. In order to return the grinding disk to the piece of work, the crank 13 1s thereupon turned back through the same number of revolutions until the same comes again into contact with the abutment. If the crank 15, after the index pin 16 has been loosened, is again moved through a whole revolution in the direction opposite 'to that indicated by the arrow, then the grinding disk support is by this means moved forward through exactly the same distance through which it was previously moved backward. It may further be stated that, if desired, the driving mechanism of the grinding wheel or disk may be operated after the completion of the coarse adjustment while the fine or 'minutely accurate adjustmentof the grinding wheel or disk may be effected throu h the medium of the crank 15 only when t e grinding wheel is already in o eration.

Having now particularly escribed and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is 1. In a grinding machine, a grinding wheel mounted to have reciprocating movement, a fixed axle, a sun wheel rotatable thereon, means whereby rotation of the sun wheel reciprocates said grindingwheel, a second sun wheel loose on said axle with means for clampin it thereto at will, a planet carrier rotatable about said axle, connected planet gears carried b said planet carrier and meshing with sai sun gears a crank arm rotatable about said axle and adapted for releasable connection with said second sun gear, and means for efiecting rotation of the planet carrying gear when the crank arm is held stationary.

2. In a grinding machine, a grinding wheel mounted to hi1.\8 reciprocating movement, a fixed axle, a gear 9 journaled thereon, means for causing rotation of said gear to reciprocate said grinding wheel, a gear 3 loose on said axle with means for clamping it thereto at will, a gear 5 rotatable about said axle, connected planet gears 7 and 8 carried by said gear 5 and meshing with said gears 3 and 9, a crank arm rotatable about seioi axle, means for rigidly con- In testimon whereof I aflix my signature neeting' sniderenk arm with the gear 3, e in presence 0 two witnesses. gear 14 journaierl in said crank arm and ALBRECHT W AGNER meshing with gear 5, means for rotating 5 said gear 14:, and means for looking it Witnesses? against movement when desired. WOLDEMAR HAUPI,

Date& December, 1911, HENRY HAsPn 

